Wetting and anti-foaming agent

Abstract

A wetting agent according to Formula (I): wherein R 1 is selected from a branched alkyl group or linear alkyl group or a cycloaliphatic group or an aromatic group, each having 6 to 15 carbon atoms; R 2 is selected from hydrogen, methyl, or ethyl; R 3 is selected from hydrogen, methyl, or ethyl; R 4 is selected from hydrogen, methyl, or ethyl; R 5 is selected from methyl or ethyl; x ranges from 0 to 5; y ranges from 0 to 10; z ranges from 1 to 10; with the proviso that when x ranges from 1 to 5, R 2 is different from R 3 ; and with the proviso that when x=0, R 3 is different from R 4 . The wetting agent also imparts anti-foam properties to aqueous solutions while reducing surface tension.

What is claimed: 
     
       1. A wetting agent comprising 70-99 wt. % of a composition according to Formula (I): 
       
         
           
           
               
               
           
         
         wherein 
         R 1  is selected from a branched alkyl group or linear alkyl group or a cycloaliphatic group or an aromatic group, each having 6 to 15 carbon atoms; 
         R 2  is selected from hydrogen, methyl, or ethyl; 
         R 3  is methyl; 
         R 4  is hydrogen; 
         R 5  is selected from methyl or ethyl; 
         x is 0; 
         y ranges from 2 to 5; 
         z ranges from 3 to 10; 
         with the proviso that R 3  is different from R 4  and 
         1-30 wt. % of a composition according to Formula (II): 
       
       
         
           
           
               
               
           
         
         wherein R 6  is the same as R 1 , R 7  is the same as R 2 , R 8  is the same as R 3  and R 9  is the same as R 4 , a equals x, b equals y and c equals z. 
       
     
     
       2. The wetting agent according to  claim 1 , wherein R 1  is selected from a branched alkyl group or linear alkyl group or a cycloaliphatic group or an aromatic group, each having 6 to 10 carbon atoms. 
     
     
       3. The wetting agent according to  claim 2 , wherein R 1  is selected from nonyl, isononyl, 3, 5, 5-trimethyl hexyl, octyl, 2-methyl heptyl, 2-ethyl hexyl, 2,2,4-trimethyl pentyl, 4-methyl pentyl, heptyl, and hexyl. 
     
     
       4. The wetting agent according to  claim 1 , wherein a 0.3 wt. % solution of the wetting agent composition in aqueous solution has a dynamic surface tension ranging from 50 mN/m to 25 mN/m at 1000 ms or less surface age. 
     
     
       5. The wetting agent according to  claim 1 , wherein a 0.3 wt. % solution of the wetting agent in aqueous solution has a static surface tension ranging from 45 mN/m to 20 mN/m. 
     
     
       6. An aqueous composition comprising an effective amount of the wetting agent according to  claim 1 , wherein the aqueous composition has a foaming value less than 17 cm when measured at a concentration of 0.3 wt. % immediately after removing an air source according to the foam test procedure and has a foaming value less than 3 cm when measured at a time interval of 5 minutes after removing the air source; wherein the aqueous composition has a static surface tension ranging from 45 mN/m to 25 mN/m, when measured at a concentration of 0.3 wt. %. 
     
     
       7. The aqueous composition according to  claim 6 , wherein the aqueous composition comprises a latex polymer. 
     
     
       8. The aqueous composition according to  claim 6 , wherein the aqueous composition comprises a pigment.